POIs will not show up in Navigation mode on Mobile XT and some models of Nuvi.
They will only be seen in Browse mode and only below 120m or 80m depending on the model.
Some POIs like exits and toll booths will not show up on Nuvi, StreetPilot and Mobile XT. They are only seen on hand-held models like the 60CSx, 76CSx which has exit search funtions.